Thomas Aquinas in 50 Pages: The Layman's Quick Guide to Thomism, by Dr. Taylor Marshall

If you are looking for a clear, concise introduction to the life and work of St. Thomas Aquinas, and you have little to no background in philosophy or theology, this book does the job well. Dr. Marshall sketches out St. Thomas's life story, and explains the fundamental ideas of Thomist philosophy and the intellectual climate of St. Thomas's time in a simple, straightforward way.